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Unformatted text preview: setting in the previous activity, we place a diverging lens about half way between the screen and the converging length. After that, we use the thin-lens equation to get the focal length of the lens. Activity3: In this activity, we use the similar setup as in Activity 1.3, and find a sharp image on the screen. Then we observe the image when we cover half of the lens. And we do the same by covering the peripheral part of the lens, and the center part of the lens. Activity4: We are measuring the index of refraction of a cylindrical lens in this experiment. After getting the refraction angle of different incident angel, we can get the average value of the index of refraction. Then we measure the internal reflection angel and use this formula to find n: n=1/sin(2 θ ). Experimental Error: Measuring error, inaccuracy of human eye, malfunction of the light source, malfunction of the lens....
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This note was uploaded on 03/27/2011 for the course ECON 252 taught by Professor Robertholand during the Spring '08 term at Purdue University-West Lafayette.
- Spring '08